ICD-10-CM > O00-O9A > O20-O29 > O26 > O26.8 > O26.87 O26.87 Cervical shortening Non-Billable/Non-Specific Type 1 Excludes encounter for suspected cervical shortening ruled out (Z03.75) Codes O26.872Cervical shortening, second trimesterO26.873Cervical shortening, third trimesterO26.879Cervical shortening, unspecified trimester